3 Answers
3

In Google Docs, go to Settings -> Document Settings, then go to the Editing tab. Make sure that "Create new text documents using the latest version of the document editor" is un-checked. They don't provide a way to convert new-style documents to legacy-style documents, so unfortunately you'll need to create a new document after unchecking the "latest version of the editor" box and copy any new-style document that you want to do serious formatting on into that new document.

These features from the previous version of Google documents, however, won't be available in the new version:

Offline document access via Google Gears

Edit HTML

Edit CSS

As noted above, the Google help forums are buzzing with "bring back the ability to edit HTML/CSS, you jerks!" topics. It would probably be a good idea to add your voice to that if the feature is important to you.